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C. A. RYERSON.

FUEL SAVING ATTACHMENT FOR FURNACES.

APPLICATICN FILED MAR. 19, I920- Patented Mar. 7, 1922.

warren. SENSE? CORNELIUS; ARTHUR RYERSON,

or Ton'onro, onranro, CANADA.

FUEL-SAVING ATTACZ'IMENTFUR rnaivaoiis.

Application filed March 18, 1920;

To aZZ whom, it may concern:

Be it known that I, CORNELIUS RYER soN, of the city of Toronto, in the county of York, Province of Ontario, Canada, have invented certain new and useful Improvements in. Fuel-Saving Attachments for Furnaces, of which the following is a specification.

This invention relates to improvements on the constructions described and shown in my co-pending United States Patent No. 1,369- 841 of March 1, 1921, and my object is to devise a more compact form of the device which will be cheaper to build, and which will provide a maximum of travel for the flue gases in proportion to the over all length of the device.

I attain my object by means of the constructions hereinafter described and illustrated in the accompanying drawings in which Fig. 1 is a vertical section of a fuel saving attachment constructed in accordance with my invention;

F 2 a cross section on the line a-a 111 Fig. l; and

Fig. 3 a side elevation of part of the attachment showing a modification of the construction of the elbow of the smoke pipe and the damper cont-rolled outlet therein.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

1 is a. closed cylinder of sheet metal set substantially vertical. Through the side of this cylinder adjacent the top extends a horizontal port-ion of the smoke pipe 2, which pipe turns at right angles within the cylinder .1 and extends down to a point a short distance above the bottom of the cylinder. At the upper end of the cylinder is formed a smoke outlet surrounded by the collar This smoke outlet collar may be located either in the top of the cylinder as shown in Fig. 3 or at one side as shown in Fig. 1. An elbow 4.- joins the horizontal and vertical portions of the smoke pipe 2. In this elbow is formed a damper-controlled opening. Preferably the opening is arranged at an inclination to both the horizontal and vertical portions of the smoke pipe, as shown in Figs. 1 and 2. In the preferred arrangement, a cast metal frame 5 is secured round the edges of the opening, and on this frame, preferably at its upper edge, is hinged a damper 6 formed as a plate adapted Specification of Letters Patent.

Patented Mar. 7, 1922.

Serial No. 367,244.

to engage a flattened side on the frame 5. This damper may be actuated in any suitable manner. I show for the purpose a rock arm 7 secured to a spindle 8 extendingfrom the sides of the cylinder and provided outside with an operating handle 9. The rock arm 7 is connected by means of a pivoted link 10 witha lug on the damper 6. A damper 11 of any ordinary type is located in the horizontal portion of the smoke pipe preferably outside the cylinder as shown.

A modification of the damper 6 is shown in Fig. 3, the opening in the elbow and consequently the frame 5 being located at the top of the elbow in substantially a horizontal position instead of diagonally, thou h the operating parts remain substantially t e same. lVhen the damper 11 is open and the damper 6 closed, the products of combustion arriving through the smoke pipe 2 pass down this pipe and up through the annular space between this pipe and the cylinder and out through the smoke pipe collar 3. When the damper 6 is opened, direct draft is obtained from the horizonal part of the smoke pipe to the smoke pipe collar 3, so that the draft is no longer checked by the gasses following the circuitous route above referred to. Whether the damper 6 is set for direct or indirect draft, the draft may be controlled at any time by the damper 11.

A clean out door 12 is provided in the side of the cylinder adjacent the bottom as shown in F ig, 1. Air to lighten the heavy products of combustion or to ventilate the apartment in which the device is located may be admitted through a pipe 13, which, when in position, extends up within the lower end of the smoke pipe 2 and preferably has a baffle or cap supported above its upper ends. This pipe 13 preferably communicates with an opening in the bottom of the cylinder controlled by a damper 14 as shown in Fig. 1.

For some purposes it is desirable to allow cold air to mix with the flue gasses after they pass out from the cylinder 1. I therefore provide the annular slide damper 15 for that purpose.

It is desirable to be able to vary the length of the circuitous path through which the products of combustion travel to suit different furnaces or different conditions of draft. I therefore prefer to make the cylinder 1. and the pipe 2 telescopic with sleeved horizontally through the side of the cylinder near the top and then vertically part way down the cylinder; an elbow connecting the vertical and horizontal portions of the pipe and provided with a smoke opening and a damper controlling said opening whereby the products of combustion may be caused to pass through the smoke pipe and cylinder or directly between the horizontal part of the smoke pipe and the smoke pipe collar.

2. A. fuel saving attachment constructed as set forth in claim 1 in which the opening in the elbow is arranged opposite the horizontal portion of the smoke pipe and is inclined relative to the axes of both parts of the smoke pipe and a frame is provided about said opening on which the damper is hinged and which it is adapted to engage to close the opening.

Signed at Toronto, Canada, this lath day of January 1920.

CORNELIUS ARTHUR RYERSON. 

